Glycerin (cp = 2400 J/kg·K) at 20°C and 0.5 kg/s is to be heated by ethylene glycol (cp = 2500 J/kg·K) at 60°C in a thin-walled double-pipe parallel-flow heat exchanger. The temperature difference between the two fluids is 15°C at the outlet of the heat exchanger. If the overall heat transfer coefficient is 240 W/m2·K and the heat transfer surface area is 3.2 m2, determine (a) the rate of heat transfer, (b) the outlet temperature of the glycerin, and (c) the mass flow rate of the ethylene glycol.
Heat Exchangers
Heat exchangers are the types of equipment that are primarily employed to transfer the thermal energy from one fluid to another, provided that one of the fluids should be at a higher thermal energy content than the other fluid.
Heat Exchanger
The heat exchanger is a combination of two words ''Heat'' and ''Exchanger''. It is a mechanical device that is used to exchange heat energy between two fluids.
Glycerin (cp = 2400 J/kg·K) at 20°C and 0.5 kg/s is
to be heated by ethylene glycol (cp = 2500 J/kg·K) at 60°C
in a thin-walled double-pipe parallel-flow heat exchanger.
The temperature difference between the two fluids is 15°C at
the outlet of the heat exchanger. If the overall heat transfer
coefficient is 240 W/m2·K and the heat transfer surface area
is 3.2 m2, determine (a) the rate of heat transfer, (b) the outlet
temperature of the glycerin, and (c) the mass flow rate of the
ethylene glycol.
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